He was outstanding. Hamill’s acting never got enough credit, he was the one who completely sold Yoda has a real being and not a puppet. Even Frank Oz credits him for that. In TLJ, he sold Luke as a man weighed down by the weight of his legacy, legend and failure. Then he manages to still learn and try to start making a difference. His sacrifice may be the most powerful scene in the franchise. In one move, he manages to save the Resistance, inspire the entire galaxy to stand up to the First Order, and show the First Order that their new Emperor is weak and really only in charge due to his powers.
...
Luke took the legend that has weighed him down and made him doubt himself and made it into a symbol to inspire.
Which is still in theme with his character arc since day one in some ways. The movie had some flaws (chiefly dispatching Snoke so quickly and with no buildup) but it's underrated in my book. Had Rian done TFA in tandem with Abrams, we'd probably be better off. No half-baked mystery boxes that we know would never get properly addressed if not at all, better villains (Benecio Del Toro was perfectly cast), Phasma being more than just Star Wars' version of Kenny who dies in every episode (as in TLJ her death isn't used as comic relief), no blatant copying (TLJ had some big homage but nothing stuck out as badly as TFA) Abrams is a first rate producer but he needs to have a co-writer and they'd nail every aspect. Like a certain Lucas/Spielbeg. Or Grant/Naylor.
I wouldn’t be surprised if Rise of Skywalker shows Hux constantly trying to undermine and backstab Kylo, especially since he now knows his weakness is his past and family. I’m hoping the stories of Luke returning and how one man stood up to AT-ATs and Kylo-Ren without getting dirty leads to a much larger Resistance ready to fight back.
Hux might lose, and quickly, but it would be interesting if not fun to see. I can't see Kylo turning good. Was hoping Rey would turn evil and join him, but that would have been too novel and creative a curveball.

It'd be sweet in IX to see Finn develop his light saber skills and show some growth. Not sure what made me think of that, but TFA wasn't without some worthy scenes and the brief confrontation between him and Ren was pretty worthwhile.